add IsIndeterminate property for CircleProgressBar

src/Shared/HandyControl_Shared/Controls/ProgressBar/CircleProgressBar.cs

@@ -1,4 +1,5 @@
 using System.Windows;
+using System.Windows.Controls;
 using System.Windows.Controls.Primitives;
 using HandyControl.Data;
 using HandyControl.Expression.Shapes;
@@ -19,6 +20,10 @@ namespace HandyControl.Controls
         public static readonly DependencyProperty TextProperty = DependencyProperty.Register(
             "Text", typeof(string), typeof(CircleProgressBar), new PropertyMetadata(default(string)));
 
+        public static readonly DependencyProperty IsIndeterminateProperty =
+            ProgressBar.IsIndeterminateProperty.AddOwner(typeof(CircleProgressBar),
+                new FrameworkPropertyMetadata(ValueBoxes.FalseBox));
+
         private Arc _indicator;
 
         static CircleProgressBar()
@@ -47,6 +52,12 @@ namespace HandyControl.Controls
             set => SetValue(ArcThicknessProperty, value);
         }
 
+        public bool IsIndeterminate
+        {
+            get => (bool)GetValue(IsIndeterminateProperty);
+            set => SetValue(IsIndeterminateProperty, value);
+        }
+
         private void SetProgressBarIndicatorAngle()
         {
             if (_indicator == null) return;